U.S. patent number 10,917,152 [Application Number 16/489,720] was granted by the patent office on 2021-02-09 for terminal apparatus, base station apparatus, and communication method.
This patent grant is currently assigned to FG Innovation Company Limited, Sharp Kabushiki Kaisha. The grantee listed for this patent is FG Innovation Company Limited, Sharp Kabushiki Kaisha. Invention is credited to Liqing Liu, Wataru Ouchi, Shoichi Suzuki, Tomoki Yoshimura.
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United States Patent |
10,917,152 |
Yoshimura , et al. |
February 9, 2021 |
Terminal apparatus, base station apparatus, and communication
method
Abstract
This terminal apparatus is provided with: a receiver configured
to receive at least a first physical signal and/or a second
physical signal, wherein the first physical signal is generated
during a first period, the first physical signal corresponds to a
first beam during the first period, the second physical signal
corresponds to the first beam in a case that the second physical
signal is generated during the first period, and the second
physical signal corresponds to a second beam in a case that the
second physical signal is generated during a second period.
Inventors: |
Yoshimura; Tomoki (Sakai,
JP), Suzuki; Shoichi (Sakai, JP), Ouchi;
Wataru (Sakai, JP), Liu; Liqing (Sakai,
JP) |
Applicant: |
Name |
City |
State |
Country |
Type |
Sharp Kabushiki Kaisha
FG Innovation Company Limited |
Sakai
Tuen Mun |
N/A
N/A |
JP
HK |
|
|
Assignee: |
FG Innovation Company Limited
(Hong Kong, HK)
Sharp Kabushiki Kaisha (Osaka, JP)
|
Family
ID: |
1000005353139 |
Appl.
No.: |
16/489,720 |
Filed: |
February 27, 2018 |
PCT
Filed: |
February 27, 2018 |
PCT No.: |
PCT/JP2018/007181 |
371(c)(1),(2),(4) Date: |
August 29, 2019 |
PCT
Pub. No.: |
WO2018/159588 |
PCT
Pub. Date: |
September 07, 2018 |
Prior Publication Data
|
|
|
|
Document
Identifier |
Publication Date |
|
US 20190386728 A1 |
Dec 19, 2019 |
|
Foreign Application Priority Data
|
|
|
|
|
Mar 2, 2017 [JP] |
|
|
2017-039409 |
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
H04B
7/0617 (20130101); H04W 72/046 (20130101) |
Current International
Class: |
H04B
7/06 (20060101); H04W 72/04 (20090101) |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
Official Communication issued in International Patent Application
No. PCT/JP2018/007181, dated May 22, 2018. cited by applicant .
NTT Docomo, "New SID Proposal: Study on New Radio Access
Technology", 3GPP TSG RAN Meeting #71, RP-160671, Mar. 7-10, 2016,
8 pages. cited by applicant .
LG Electronics, "Discussion on QCL for NR", 3GPP TSG RAN WG1
Meeting #88, R1-1702466, Feb. 13-17, 2017, pp. 1-3. cited by
applicant .
Lenovo et al., "CSI-RS design for beam management", 3GPP TSG RAN
WG1 Meeting #88, R1-1702664, Feb. 13-17, 2017, 5 pages. cited by
applicant .
Interdigital Communications, "On Beam Management for Control and
Data Channels", 3GPP TSG-RAN WG1 #88, R1-1702324, Feb. 13-17, 2017,
pp. 1-4. cited by applicant.
|
Primary Examiner: Ali; Syed
Attorney, Agent or Firm: Imperium Patent Works
Claims
The invention claimed is:
1. A terminal device comprising: reception circuitry configured
and/or programmed to monitor a control channel, wherein an antenna
port of the control channel has a quasi co-location relationship
with an antenna port of a first channel state-information-reference
signal (CSI-RS); and decoding circuitry configured and/or
programmed to decode a shared channel based on the control channel;
wherein in a case that the control channel is received on a first
duration and the shared channel is received on a second duration
that is different from the first duration, an antenna port of the
shared channel has a quasi co-location with an antenna port of a
second channel state information-reference signal; and in a case
that the control channel and the shared channel are received on the
same duration, the antenna port of the shared channel has a quasi
co-location relationship with the antenna port of the first channel
information-reference signal, wherein a duration refers to one or a
plurality of slots, or one or a plurality of OFDM symbols in time
domain; wherein a length of an OFDM symbol is based on a number of
points in Fast Fourier Transform (FFT) used to generate the OFDM
symbol, and the length of the OFDM symbol includes a Cyclic Prefix
(CP) length added to the OFDM symbol.
2. A communication method performed by a terminal device, the
communication method comprising: monitoring a control channel,
wherein an antenna port of the control channel has a quasi
co-location relationship with an antenna port of a first channel
state-information-reference signal (CSI-RS); and decoding a shared
channel based on the control channel; wherein in a case that the
control channel is received on a first duration and the shared
channel is received on a second duration that is different from the
first duration, an antenna port of the shared channel has a quasi
co-location with an antenna port of a second channel state
information-reference signal; and in a case that the control
channel and the shared channel are received on the same duration,
the antenna port of the shared channel has a quasi co-location
relationship with the antenna port of the first channel
information-reference signal, wherein a duration refers to one or a
plurality of slots, or one or a plurality of OFDM symbols in time
domain; wherein a length of an OFDM symbol is based on a number of
points in Fast Fourier Transform (FFT) used to generate the OFDM
symbol, and the length of the OFDM symbol includes a Cyclic Prefix
(CP) length added to the OFDM symbol.
Description
TECHNICAL FIELD
The present invention relates to a terminal apparatus, a base
station apparatus, and a communication method.
This application claims priority based on JP 2017-039409 filed on
Mar. 2, 2017, the contents of which are incorporated herein by
reference.
BACKGROUND ART
A radio access method and a radio network for cellular mobile
communications (hereinafter, referred to as "Long Term Evolution
(LTE)", or "Evolved Universal Terrestrial Radio Access (EUTRA)")
have been studied in the 3rd Generation Partnership Project (3GPP).
In LTE, a base station apparatus is also referred to as an evolved
NodeB (eNodeB), and a terminal apparatus is also referred to as a
User Equipment (UE). LTE is a cellular communication system in
which multiple areas are deployed in a cellular structure, with
each of the multiple areas being covered by a base station
apparatus. A single base station apparatus may manage a plurality
of cells.
In 3GPP, a next-generation standard (New Radio (NR)) has been
studied to make a proposal to International Mobile
Telecommunication (IMT)-2020, a standard for a next-generation
mobile communication system standardized by International
Telecommunication Union (ITU) (NPL1). The NR is required, in a
single technology framework, to meet a requirement assuming three
scenarios of enhanced Mobile BroadBand (eMBB), massive Machine Type
Communication (mMTC), and Ultra Reliable and Low Latency
Communication (URLLC).
CITATION LIST
Non Patent Literature
Non Patent Literature 1: "New SID proposal: Study on New Radio
Access Technology", RP-160671, NTT docomo, 3GPP TSG RAN Meeting
#71, Goteborg, Sweden, 7-10 Mar. 2016.
SUMMARY OF INVENTION
Technical Problem
An aspect of the present invention provides a terminal apparatus
capable of efficiently performing downlink reception, a
communication method used for the terminal apparatus, a base
station apparatus capable of efficiently performing downlink
transmission, and a communication method used for the base station
apparatus.
Solution to Problem
(1) A first aspect of the present invention is a terminal apparatus
including: a receiver configured to receive a first physical signal
used to schedule a second physical signal, wherein a receive beam
corresponding to the second physical signal is provided based on a
timing at which the second physical signal is generated, and
correspondence of the second physical signal to the receive beam
corresponds to a QCL relationship between a first antenna port to
which the second physical signal is mapped and an antenna port
corresponding to the receive beam.
(2) A second aspect of the present invention is the above-described
terminal apparatus, wherein in a case that the second physical
signal is generated at a predetermined timing, the receive beam is
provided based at least on downlink control information.
(3) A third aspect of the present invention is a base station
apparatus including: a transmitter configured to transmit a first
physical signal used to schedule a second physical signal, wherein
a transmit beam corresponding to the second physical signal is
provided based on a timing at which the second physical signal is
generated, and correspondence of the second physical signal to the
transmit beam corresponds to a QCL relationship between a first
antenna port to which the second physical signal is mapped and an
antenna port corresponding to the transmit beam.
(4) A fourth aspect of the present invention is the above-described
base station apparatus, wherein in a case that the second physical
signal is generated at a predetermined timing, the transmit beam is
indicated based at least on downlink control information.
(5) A fifth aspect of the present invention is a communication
method for a terminal apparatus, including the step of: receiving a
first physical signal used to schedule a second physical signal,
wherein a receive beam corresponding to the second physical signal
is provided based on a timing at which the second physical signal
is generated, and correspondence of the second physical signal to
the receive beam corresponds to a QCL relationship between a first
antenna port to which the second physical signal is mapped and an
antenna port corresponding to the receive beam.
(6) A sixth aspect of the present invention is a communication
method for a base station apparatus, including the step of:
transmitting a first physical signal used to schedule a second
physical signal, wherein a transmit beam corresponding to the
second physical signal is provided based on a timing at which the
second physical signal is generated, and correspondence of the
second physical signal to the transmit beam corresponds to a QCL
relationship between a first antenna port to which the second
physical signal is mapped and an antenna port corresponding to the
transmit beam.
Advantageous Effects of Invention
According to the present invention, the terminal apparatus can
efficiently perform downlink reception. In addition, the base
station apparatus can efficiently perform downlink
transmission.
BRIEF DESCRIPTION OF DRAWINGS
FIG. 1 is a conceptual diagram of a radio communication system
according to an aspect of the present embodiment.
FIG. 2 is an example illustrating a configuration of a radio frame,
a subframe, and a slot according to the aspect of the present
embodiment.
FIG. 3 is a diagram illustrating a configuration example of the
slot and a mini-slot according to the aspect of the present
embodiment.
FIG. 4 is a diagram illustrating an example of a first initial
connection procedure (4-step contention based RACH procedure)
according to the aspect of the present embodiment.
FIG. 5 is a diagram illustrating an example of a second initial
connection procedure (2-step contention based RACH procedure)
according to the aspect of the present embodiment.
FIG. 6 is a diagram illustrating an example of a resource element
included in the slot according to the aspect of the present
embodiment.
FIG. 7 is a diagram illustrating an example of a correspondence
relationship between beams of a terminal apparatus 1 and a base
station apparatus 3 in a downlink transmission according to the
aspect of the present embodiment.
FIG. 8 is a diagram illustrating an example of a correspondence
relationship between a physical signal included in a slot and a
receive beam according to the aspect of the present embodiment.
FIG. 9 is a schematic block diagram illustrating a configuration
example of the terminal apparatus 1 according to the aspect of the
present embodiment.
FIG. 10 is a schematic block diagram illustrating a configuration
example of the base station apparatus 3 according to the aspect of
the present embodiment.
DESCRIPTION OF EMBODIMENTS
An embodiment of the present invention will be described below.
FIG. 1 is a conceptual diagram of a radio communication system
according to an aspect of the present embodiment. In FIG. 1, the
radio communication system includes terminal apparatuses 1A to 1C
and a base station apparatus 3. Hereinafter, each of the terminal
apparatuses 1A to 1C is also referred to as a terminal apparatus
1.
Hereinafter, various radio parameters relating to communication
between the terminal apparatus 1 and the base station apparatus 3
will be described. Here, at least some of the radio parameters
(e.g., Subcarrier Spacing (SCS)) are also referred to as
Numerology. The radio parameters include at least some of the
subcarrier spacing, a length of an OFDM symbol, a length of a
subframe, a length of a slot, and a length of a mini-slot.
The subcarrier spacing may be classified into two kinds of a
reference subcarrier spacing (Reference SCS, Reference Numerology)
and a subcarrier spacing for a communication method used for actual
radio communication (Actual SCS, Actual Numerology). The reference
subcarrier spacing may be used to determine at least some of the
radio parameters. For example, the reference subcarrier spacing is
used to configure the length of the subframe. A method for
determining the length of the subframe based on the reference
subcarrier spacing will be described later. Here, the reference
subcarrier spacing is 15 kHz, for example.
The subcarrier spacing used for the actual radio communication is
one of the radio parameters for the communication method used for
no communication between the terminal apparatus 1 and the base
station apparatus 3 (e.g. Orthogonal Frequency Division Multiplex
(OFDM), Orthogonal Frequency Division Multiple Access (OFDMA),
Single Carrier-Frequency Division Multiple Access (SC-FDMA),
Discrete Fourier Transform-spread-OFDM (DFT-s-OFDM)). Hereinafter,
the reference subcarrier spacing is also referred to as a first
subcarrier spacing. Additionally, the subcarrier spacing used for
the actual radio communication is also referred to as a second
subcarrier spacing.
FIG. 2 is an example illustrating a configuration of a radio frame,
a subframe, and a slot according to the aspect of the present
embodiment. In the example illustrated in FIG. 2, the length of the
slot is 0.5 ms, the length of the subframe is 1 ms, and the length
of the radio frame is 10 ms. The slot may be a unit of resource
allocation in a time domain. For example, the slot may be a unit by
which a transport block is mapped. For example, the transport block
may be mapped to one slot. Here, the transport block may be a unit
of data transmitted within a predetermined interval (e.g.,
Transmission Time Interval (TTI)) defined by a higher layer (e.g.,
Mediam Access Control (MAC). The transport block may be any one of
a data block, transport data, transmission data, a transmission
code, a transmission block, a payload, information, an information
block, coded data, downlink data, and uplink data.
For example, the length of the slot may be given by the number of
OFDM symbols. For example, the number of OFDM symbols may be 7 or
14. The length of the slot may be given at least based on the
length of the OFDM symbol. The length of the OFDM symbol may vary
at least based on the second subcarrier spacing. Furthermore, the
length of the OFDM symbol may be given at least based on the number
of points in Fast Fourier Transform (FFT) used to generate the OFDM
symbol. Furthermore, the length of the OFDM symbol may include a
length of a Cyclic Prefix (CP) added to the OFDM symbol. Here, the
OFDM symbol may also be referred to as a symbol. Additionally, in a
case that a communication method other than the OFDM is used in
communication between the terminal apparatus 1 and the base station
apparatus 3 (for example, a case that the SC-FDMA or the DFT-s-OFDM
is used, or the like), an SC-FDMA symbol and/or a DFT-s-OFDM symbol
to be generated is also referred to as the OFDM symbol. Here, for
example, the length of the slot may be 0.25 ms, 0.5 ms, 1 ms, 2 ms,
or 3 ms.
The length of the slot may be determined based on at least the
subcarrier spacing and the type of CP added to the OFDM symbol. The
subcarrier spacing may be determined based on at least the length
of the slot and the type of CP added to the OFDM symbol.
Here, the OFDM includes a multi-carrier communication method to
which a Pulse Shape, PAPR reduction, out-of-band radiation
reduction, or filtering, and/or phase processing (e.g., phase
rotation, etc.) is applied. Here, the multi-carrier communication
method is, for example, the OFDM. Furthermore, the multi-carrier
communication method may be a communication method for
generating/transmitting a signal in which a plurality of
subcarriers is multiplexed.
The length of the subframe may be 1 ms. Furthermore, the length of
the subframe may be given based on the first subcarrier spacing.
For example, in a case that the first subcarrier spacing is 15 kHz,
the length of the subframe may be 1 ms. The subframe may include 1
or a plurality of slots.
The radio frame may be given by the number of subframes. The number
of subframes for the radio frame may be, for example, 10.
FIG. 3 is a diagram illustrating a configuration example of the
slot and a mini-slot according to the aspect of the present
embodiment. In FIG. 3, seven OFDM symbols configure one slot. The
mini-slot may include the smaller number of OFDM symbols than the
number of OFDM symbols configuring the slot. Furthermore, the
mini-slot may also be shorter in length than the slot. FIG. 3
illustrates a mini-slot #0 to a mini-slot #5 as an example of a
mini-slot configuration. The mini-slot may be configured with one
OFDM symbol, as illustrated by the mini-slot #0. Additionally, the
mini-slot may also be configured with two OFDM symbols as
illustrated by the mini-slots #1 through #3. Additionally, a gap
may also be inserted between the two mini-slots, as illustrated by
the mini-slot #1 and the mini-slot #2. Additionally, the mini-slot
may also be configured across a boundary between a slot #0 and a
slot #1, as illustrated by the mini-slot #5. That is, the mini-slot
may be configured across the boundary of the slots. Here, the
mini-slot is also referred to as a subslot. Additionally, the
mini-slot is also referred to as a short Transmission Time Interval
(short TTI (sTTI)). Additionally, in the following, the slot may be
replaced by the mini-slot. The mini-slot may be configured by the
same number of OFDM symbols as the slot. The mini-slot may include
the larger number of OFDM symbols than the number of OFDM symbols
configuring the slot. The length of the mini-slot in the time
domain may be shorter than the slot. The length of the mini-slot in
the time domain may be shorter than the subframe. The slot is also
referred to as TTI.
An example of an initial connection procedure according to the
present embodiment will be described below.
The base station apparatus 3 includes a communicable range (or a
communication area) controlled by the base station apparatus 3. The
communicable range can be divided into one or a plurality of cells
(or serving cells, subcells, beams, etc.) to manage communication
with the terminal apparatus 1 for each cell. On the other hand, the
terminal apparatus 1 selects at least one cell from among a
plurality of cells, and attempts to establish a connection with the
base station apparatus 3. Here, a first state in which a connection
between the terminal apparatus 1 and at least one cell of the base
station apparatus 3 is established is also referred to as an RRC
Connection. Here, RRC is Radio Resource Control. Additionally, a
second state in which the terminal apparatus 1 does not establish a
connection with any of the cells of the base station apparatus 3 is
also referred to as RRC idle. In addition, a third state in which a
connection between the terminal apparatus 1 and at least one cell
of the base station apparatus 3 is established, but some functions
are limited between the terminal apparatus 1 and the base station
apparatus 3 is also referred to as RRC suspended. The RRC suspended
is also referred to as an RRC inactive.
The terminal apparatus 1 in the RRC idle may attempt to establish a
connection with at least one cell (e.g., target cell) of the base
station apparatus 3. FIG. 4 is a diagram illustrating an example of
a first initial connection procedure (4-step contention based RACH
procedure) according to the aspect of the present embodiment. The
first initial connection procedure is configured to include at
least some of steps 5101 to 5104.
Step 5101 is a step in which the terminal apparatus 1 makes a
request to the target cell, via a physical channel, for a response
for an initial connection. Alternatively, step 5101 is a step in
which the terminal apparatus 1 performs a first transmission to the
target cell via the physical channel. Here, the physical channel
may be, for example, a Physical Random Access Channel (PRACH). The
physical channel may be a channel at least used for requesting a
response for the initial connection. Furthermore, the physical
channel is also referred to as a random access channel. Here, an
operation in which information is transmitted via the physical
channel (or channel) is also referred to as the physical channel
(or channel) being transmitted.
The PRACH may be used to transmit a random access preamble (random
access message 1). The PRACH may be used to indicate an initial
connection establishment procedure, a handover procedure,
connection re-establishment procedure, synchronization (timing
adjustment) for uplink transmission, and a request for the PUSCH
(UL-SCH) resources.
The random access preamble may be given by cyclic shifting the
Zadoff-Chu sequence corresponding to a physical root sequence index
u. The Zadoff-Chu sequence is generated based on the physical root
sequence index u. In one cell, a plurality of random access
preambles may be defined. The random access preamble may be
identified by an index of the random access preamble. A different
random access preamble corresponding to a different index of a
random access preamble corresponds to a different combination of
physical root sequence index u and cyclic shift. A physical root
sequence index u and a cyclic shift may be given based at least on
information included in system information.
Before performing step 5101, the terminal apparatus 1 acquires
information associated with a transmission method of the random
access channel. For example, the information associated with the
transmission method of the random access channel may be
synchronization with the target cell, a transmission timing of the
random access channel, a configuration of the random access
channel, a configuration of a bit sequence transmitted via the
random access channel, or the like. For example, the terminal
apparatus 1 may receive a Synchronization Signal (SS) transmitted
by the base station apparatus 3 in order to synchronize with the
downlink of the target cell. The synchronization includes at least
one of synchronization of the time domain and synchronization of a
frequency domain.
The synchronization signal may include a Primary Synchronization
Signal (PSS) and/or a Secondary Synchronization Signal (SSS).
The synchronization signal may be transmitted including an ID (cell
ID) of the target cell. Alternatively, the synchronization signal
may be transmitted including a sequence generated at least based on
the cell ID. The cell ID may be used at least to identify the cell.
The synchronization signal may be transmitted while the transmit
beam being applied thereto.
The synchronization signal may be transmitted including an index of
the beam (beam index) applied to the synchronization signal. The
beam index may be included in the cell ID. The beam index may be
derived from the cell ID. Additionally, the synchronization signal
may also be transmitted including a sequence generated at least
based on the index of the beam applied to the synchronization
signal. Here, the beam index may be associated with an index of a
time and/or a frequency at which the synchronization signal is
transmitted. The beam index may be associated with an index of the
OFDM symbol in which the synchronization signal is transmitted. The
beam index may be associated with an index of a slot in which the
synchronization signal is transmitted. The beam index may be
associated with an index of a subframe in which the synchronization
signal is transmitted. The beam index may be an index for
identifying a predetermined synchronization signal. For example,
the synchronization signal may be transmitted at a plurality of
times within a predetermined period (e.g., the slot, the subframe,
etc.). The beam index may be used to identify the synchronization
signals transmitted in the predetermined period. The beam index may
be an index to indicate the location of the synchronization signal
transmitted in the predetermined period.
The terminal apparatus 1 may receive a broadcast channel (for
example, Physical Broadcast CHannel (PBCH)) transmitted from the
target cell. The broadcast channel may be transmitted including an
essential information block, such as a Master Information Block
(MIB) and an Essential Information Block (EIB), which includes
essential system information needed by the terminal apparatus 1.
Here, the essential information block may be part of the system
information. The essential information block may include a number
of the radio frame. Additionally, the essential information block
may include information about a position within a superframe
including a plurality of radio frames (for example, information for
indicating at least some of System Frame Numbers (SFNs) in the
superframe). Additionally, the broadcast channel may include the
beam index. The broadcast channel may include at least some of the
information associated with the transmission method of the random
access channel. The MIB may be information commonly used in the
cell. The MIB may be information commonly used for a group of
terminal apparatuses 1 that detect synchronization signals
associated with the MIB.
The MIB is mapped to a Broadcast Control Channel (BCCH) in a higher
layer channel (logical channel). The MIB is mapped to the broadcast
channel in a channel of the physical layer (Physical channel).
Here, the higher layer channel is defined by a type of information
to be transmitted. For example, the BCCH is the higher layer
channel that is used to transmit Broadcasting system control
information. Here, the broadcasting system control information is,
for example, the MIB. Additionally, a Common Control CHannel (CCCH)
is the higher layer channel used to transmit common information
among the plurality of terminal apparatuses 1. Here, the CCCH is
used for the terminal apparatus 1 that is not in the RRC
connection, for example. Additionally, a Dedicated Control CHannel
(DCCH) is the higher layer channel used to transmit dedicated
control information to the terminal apparatus 1. Here, the DCCH is
used for the terminal apparatus 1 in the RRC connection, for
example.
Here, the channel of the physical layer includes at least some or
all of the broadcast channel, the random access channel, the
control channel, and a shared channel.
The terminal apparatus 1 may receive at least part of the system
information based on at least the information included in the
broadcast channel. At least a portion of the system information may
be included in a shared channel indicated by a downlink grant
included in the control channel for the first initial connection.
At least a portion of the system information may be included in a
shared channel indicated by information included in the PBCH.
The system information may include at least information for the
terminal apparatus 1 to access the cell. The system information may
include at least radio resource configuration information that is
common to the plurality of terminal apparatuses 1. Here, the radio
resource configuration information may be information related to
the configuration of the radio resource for the downlink.
Additionally, the radio resource configuration information may be
radio resource configuration information for the uplink. Here, the
radio resource configuration information for the uplink may include
at least a portion of information associated with the transmission
method of the random access channel. Additionally, the radio
resource configuration information for the uplink may include
information for the resource configuration of the random access
channel. Additionally, the system information may also include at
least resource allocation information of at least some system
information.
The resource allocation of the system information may be configured
for each block (System Information Block (SIB)) that includes at
least a portion of the system information. By the base station
apparatus 3, the SIB may be broadcast in one cell or may be
transmitted dedicatedly to the terminal apparatus 1.
A System Information Block Type 1 (SIB1) includes at least
information for the terminal apparatus 1 to access the cell
(plmnIdentityList, for example). The SIB1 is transmitted on the
shared channel indicated by the downlink grant included in the
control channel for the first initial connection.
On the other hand, the SIB1 is mapped to the BCCH. The SIB1 is
information broadcast in one cell.
A System Information Block Type 2 (SIB2) includes at least the
parameter of the physical layer. Here, the parameter of the
physical layer is, for example, information associated with the
transmission method of the random access channel. The SIB2 is
transmitted on the shared channel indicated by the downlink grant
included in the control channel for the initial connection.
On the other hand, the SIB2 is mapped to the BCCH. The SIB2 is
information broadcast in one cell.
Step 5102 may include an operation of the terminal apparatus 1
monitoring a predetermined physical channel for at least a
predetermined period. For example, the predetermined physical
channel may be a Control Channel. The control channel may be, for
example, a Physical Downlink Control CHannel (PDCCH). The control
channel may be transmitted, for example, including at least a
portion of the Downlink Control Information (DCI). Here, the
downlink control information may include resource allocation
information of the downlink. The resource allocation information of
the downlink is also referred to as a Downlink Grant (DL Grant).
Additionally, the downlink control information may include resource
allocation information of the uplink. The resource allocation
information of the uplink is also referred to as an Uplink Grant
(UL Grant). Additionally, the downlink control information may
include information to be used for a group of terminal apparatuses
including the terminal apparatus 1. Additionally, the downlink
control information may include information broadcast at a
predetermined cell. The downlink control information may include at
least information indicating a region (Control resource set,
Control Channel Region (Control Region)) to which the control
channel may be mapped. Here, the information indicating the region
to which the control channel may be mapped may be the number of
OFDM symbols included in the region to which the control channel
may be mapped. That is, the information indicating the region to
which the control channel may be mapped may include information
about the time domain. The control resource set is also referred to
as a channel set. A configuration of the control channel and
details of the control channel will be described later. The
terminal apparatus 1 can monitor the control channel by being
provided with the information indicating the region to which the
control channel may be mapped. The downlink grant and the uplink
grant are also referred to as a grant.
Here, the information indicating the region to which the control
channel may be mapped may be mapped to the BCCH. Furthermore, the
information indicating the region to which the control channel may
be mapped may be mapped to the CCCH. Furthermore, the information
indicating the region to which the control channel may be mapped
may be mapped to the DCCH.
For example, in step 5102, a control channel including
predetermined downlink control information may be received. The
predetermined downlink control information may include the uplink
grant. Additionally, the predetermined downlink control information
may include the downlink grant. The downlink grant may be resource
allocation information of the shared channel (or data channel).
Here, the shared channel is also referred to as a Physical Shared
CHannel (PSCH). Here, the shared channel may include at least one
of a Physical Downlink Shared Channel and a Physical Uplink Shared
Channel. The physical downlink shared channel may be a downlink
shared channel. The physical uplink shared channel may be an uplink
shared channel.
In a case that the control channel including the downlink grant is
received in step 5102, the shared channel indicated by the downlink
grant may include the uplink grant. The uplink grant is also
referred to as a random access response grant. The uplink grant may
be resource allocation information for the shared channel including
a first message transmitted by the terminal apparatus 1 in step
5103. On the other hand, the uplink grant may include resource
allocation information of the physical uplink shared channel.
Here, the control channel monitored in step 5102 by the terminal
apparatus 1 is also referred to as a control channel for the first
initial connection. The control channel for the first initial
connection may include a CRC sequence masked based on a sequence
(e.g., Radio Network Temporary Identifier (RNTI), Random
Access-RNTI (RA-RNTI)) used for the first initial connection. That
is, the terminal apparatus 1 may use the RA-RNTI in the monitor of
the control channel for the first initial connection.
The control channel for the first initial connection procedure may
be a control channel common to the terminal apparatuses 1 in the
cell. Alternatively, the control channel for the first initial
connection procedure may be a control channel common to the group
of the terminal apparatuses 1. For example, information, which is
mapped to the BCCH or the CCCH, indicating the region to which the
control channel may be mapped may indicate a region to which the
control channel common to the terminal apparatuses in the cell
and/or the group of the terminal apparatuses 1 may be mapped.
Furthermore, at least some of the control channels other than the
control channel for the first initial connection procedure may be a
control channel specific to the terminal apparatus 1. For example,
information, mapped to the DCCH, for indicating the region to which
the control channel may be mapped may indicate a region to which at
least some of the control channels other than the control channel
for the first initial connection procedure may be mapped.
Step 5103 may include an operation of transmitting a physical
uplink shared channel including the first message to be used for
the terminal apparatus 1 to make a request to a target cell for a
connection. The first message may be used for the terminal
apparatus 1 to make the request to the target cell for the
connection in the first initial connection procedure.
Step 5104 may include an operation of monitoring (or expecting to
receive) a second message that is a response to the first message.
The second message may be a message indicating that the first
message has been properly received by the base station apparatus 3.
The second message may be a message indicating that no Contention
has occurred with other terminal apparatuses in the first initial
connection procedure. The second message may be transmitted for a
Contention resolution. The second message is also referred to as a
contention resolution message. The second message may include a
terminal apparatus-specific ID. The ID may be a System Architecture
Evolution (SAE)-Temporary Mobile Subscriber Identity (S-TMSI), for
example.
FIG. 5 is a diagram illustrating an example of a second initial
connection procedure (2-step contention based RACH procedure)
according to the aspect of the present embodiment. The second
initial connection procedure may be configured to include at least
some of steps 5201 and 5202.
Step 5201 includes a step of transmitting the random access channel
and/or the uplink shared channel. The terminal apparatus 1 may
transmit the random access channel including information indicating
the resource of the uplink shared channel and the uplink shared
channel. The uplink shared channel may include the first message.
Here, in step 5201, the control channel may be transmitted by the
terminal apparatus 1 instead of the random access channel. The
control channel may be an uplink control channel (Physical Uplink
Control CHannel (PUCCH)). The terminal apparatus 1 may transmit the
uplink control channel including information indicating the
resource of the uplink shared channel and the uplink shared
channel.
The uplink control channel may include information indicating
whether or not decoding of the transport block has been
successfully completed (Acknowledgement (ACK), Hybrid Automatic
Request-ACK (HARQ-ACK)). Additionally, the uplink control channel
may be transmitted including Channel State Information (CSI)
estimated based on the reference signal and the synchronization
signal. Furthermore, the uplink control channel may include
Scheduling Request (SR).
A downlink control channel may include information associated with
a Start symbol indicating a start of the downlink shared channel.
Information associated with the start symbol may be used for the
downlink shared channel allocated based on the downlink control
channel.
The start symbol may be given based on at least the downlink
control channel. For example, the start symbol may be given based
on an index for the OFDM symbol to which the downlink control
channel is mapped. For example, in a case that the index for the
OFDM symbol to which the downlink control channel is mapped is
X.sub.start, the start symbol may be X.sub.start+2, may be
X.sub.start+1, or may be X.sub.start. Furthermore, in a case that
the downlink control channel is mapped to a plurality of OFDM
symbols, X.sub.start may be an index for the leading OFDM symbol to
which the downlink control channel is mapped, or may be an index
for the last OFDM symbol to which the downlink control channel is
mapped.
Step 5202 includes an operation of monitoring a predetermined
downlink control channel. The control channel is also referred to
as a control channel for the second initial connection. The control
channel for the second initial connection may include a random
access response grant. Additionally, the control channel for the
second initial connection may also be used to resolve the
contention. Additionally, the control channel for the second
initial connection may also include the second message.
Additionally, the control channel for the second initial connection
may include a terminal apparatus-specific ID.
The first initial connection procedure may be used in a case that
the terminal apparatus 1 is in the RRC idle. The second initial
connection procedure may be used in the case that the terminal
apparatus 1 is in the RRC idle. The first initial connection
procedure may be used in a case that the terminal apparatus 1 is in
the RRC suspended. The second initial connection procedure may be
used in the case that the terminal apparatus 1 is in the RRC
suspended. In addition, the first initial connection procedure may
be used at least in the case that the terminal apparatus 1 is in
the RRC idle, and the second initial connection procedure may be
used in the case that the terminal apparatus 1 is in the RRC
suspended.
A unit of the physical resource according to the present embodiment
will be described below.
FIG. 6 is a diagram illustrating an example of a resource element
included in the slot according to the aspect of the present
embodiment. Here, the Resource Element (RE) is a unit defined by
one OFDM symbol and one subcarrier. As illustrated in FIG. 6, the
slot includes N.sub.symb OFDM symbols. Additionally, the number of
subcarriers may be given by the product of the number N.sub.RB of
resource blocks and the number N.sup.RB.sub.SC of subcarriers per
one resource block. Here, the resource block indicates a group of
resource elements in the time/frequency domain. The resource block
may be used as a unit of resource allocation for the time domain
and/or the frequency domain. For example, N.sup.RB.sub.SC may be
12. N.sub.symb may be the same as the number of OFDM symbols
included in the subframe. N.sub.symb may be the same as the number
of OFDM symbols included in the slot. N.sub.RB may be given based
on a bandwidth of the cell and the first subcarrier spacing.
Additionally, N.sub.RB may be given based on the bandwidth of the
cell and the second subcarrier spacing. Additionally, N.sub.RB may
be given based on higher layer signaling (e.g., RRC signaling) or
the like transmitted from the base station apparatus 3.
Additionally, the N.sub.RB may be given based on descriptions of a
specification or the like. The resource element is identified by an
index k for the subcarrier and an index 1 for the OFDM symbol.
Here, the RRC signaling includes at least common RRC signaling and
dedicated RRC signaling. The common RRC signaling is signaling for
transmitting information mapped to the CCCH. Additionally, the
dedicated RRC signaling is signaling for transmitting information
mapped to the DCCH.
Mapping of the control channel will be described below.
The control resource set may be a set of control channels (or
control channel candidates) to be monitored by the terminal
apparatus 1. The control resource set may include the set of
control channels (or control channel candidates) to be monitored by
the terminal apparatus 1.
Here, the control resource set including the control channel for
the first initial connection is also referred to as a first control
resource set. The first control resource set may be a control
resource set common to the terminal apparatuses in the cell. A set
of control channels (or control channel candidates) included in the
first control resource set and monitored by the terminal apparatus
1 is also referred to as a Common Search Space (CSS).
Information indicating a region of the first control resource set
may be mapped to the BCCH. The information indicating the region of
the first control resource set may be given at least based on
information broadcast by the MIB and/or the SIB. The information
indicating the region of the first control resource set may be
information used for configuring the number of OFDM symbols
included in the first control resource set. The number of OFDM
symbols included in the first control resource set may be commonly
configured in one cell or a plurality of cells. The number of OFDM
symbols included in the first control resource set may be given at
least based on information broadcast by the MIB and/or the SIB.
Information indicating a region of the CSS may be mapped to the
BCCH. For example, the information indicating the region of the CSS
may be information used for configuring the number of OFDM symbols
constituting the CSS. The number of OFDM symbols constituting the
CSS may be commonly configured in one cell or a plurality of cells.
The number of OFDM symbols constituting the CSS may be given at
least based on information broadcast by the MIB and/or the SIB.
Additionally, the control resource set including the control
channel for the second initial connection is also referred to as a
second control resource set. The second control resource set may be
a control resource set common to the terminal apparatuses in the
cell. A set of control channels (or control channel candidates)
included in the second control resource set and monitored by the
terminal apparatus 1 is also referred to as the CSS.
Additionally, the control resource set, which is specifically
configured for the terminal apparatus 1, is also referred to as a
third control resource set. The third control resource set may not
include the first control resource set. The third control resource
set may not include the second control resource set. The third
control resource set may include the first control resource set.
The third control resource set may include the second control
resource set. A set of control channels (or control channel
candidates) included in the third control resource set and
monitored by the terminal apparatus 1 is also referred to as a UE
specific-Search Space (USS).
Information indicating a region of the third control resource set
may be mapped to the DCCH. The information indicating the region of
the third control resource set may be given at least based on the
dedicated RRC signaling. For example, the information indicating
the region of the third control resource set may be information
used for configuring the number of OFDM symbols included in the
third control resource set. The number of OFDM symbols included in
the third control resource set may be at least given based on the
dedicated RRC signaling.
Information indicating a region of the USS may be mapped to the
DCCH. The information indicating the region of the USS may be given
at least based on the dedicated RRC signaling. For example, the
information indicating the region of the USS may be given at least
based on the dedicated RRC signaling.
A corresponding relationship between the beams of the terminal
apparatus 1 and the base station apparatus 3 will be described
below. Here, the beam indicates a receive beam and/or a transmit
beam. In the following, a description is given of downlink radio
communication as an example, but various aspects of the present
embodiment are also preferable for uplink radio communication.
FIG. 7 is a diagram illustrating an example of a correspondence
relationship between beams of the terminal apparatus 1 and the base
station apparatus 3 in a downlink transmission according to the
aspect of the present embodiment. In FIG. 7, the terminal apparatus
1 includes three receive beams (receive beam #1, receive beam #2,
receive beam #3), and the base station apparatus 3 includes three
transmit beams (transmit beam #1, transmit beam #2, transmit beam
#3). Here, areas indicated by the diagonal lines schematically
illustrates a phenomenon in which the carrier wave signal bends due
to reflection, scattering, diffraction, refraction, and the
like.
Here, a predetermined radiation pattern may be given to the
physical signal by the application of the transmit beam. The
transmit beam may exhibit a phenomenon in which gain varies
depending on a direction. The transmit beam may be given based at
least on the directivity of the antenna used for the physical
signal to be emitted towards the radio space (channel, radio
section). The transmit beam may also be given based at least on the
phase transformation processing of the Carrier signal provided by
the transformation of the physical signal. The transmit beam may
also be given at least based on the phase transformation processing
(or precoder multiplexing) of the physical signal. Here, the
physical signal includes at least some or all of a synchronization
signal, a reference signal, and a channel of a physical layer.
Here, the physical signal transmitted by the base station apparatus
3 may be received in a predetermined reception pattern by the
receive beam being applied at the terminal apparatus 1. The receive
beam may exhibit a phenomenon in which gain varies depending on a
direction. The receive beam may be given based at least on the
directivity of the antenna used for the physical signal to be
received via the radio space. The receive beam may also be given
based at least on the phase transformation processing of the
received Carrier signal. The receive beam may also be given at
least based on the phase transformation processing (or precoder
multiplexing) of the physical signal given by transformation of the
carrier signal.
In FIG. 7, transmit beam #1 and receive beam #1 form beam pair #1.
Transmit beam #2 and receive beam #2 form beam pair #2. Transmit
beam #3 and receive beam #3 form beam pair #3. The beam pair is
provided by a pair of a transmit beam and a receive beam. Forming
beam pairs can achieve optimal reception characteristics. Here, the
optimal reception characteristics may be characteristics capable of
demodulating and decoding the received physical signal. The beam
pair may be formed only with transmit beams or only receive beams
in a case that the optimal reception characteristic is obtained.
Note that the beam widths (e.g., 3 dB beam width) of a transmit
beam and a receive beam forming a beam pair may not be the same
width. It is preferable that the beam pair be given so that the
terminal apparatus 1 and the base station apparatus 3 can perform
the downlink transmission suitably. For example, in a case that a
predetermined transmit beam is applied to the physical signal
transmitted from the base station apparatus 3, and that it is
preferable that a predetermined receive beam be applied for
reception of the physical signal, it is preferable that the
predetermined transmit beam and the predetermined receive beam form
a beam pair. Here, the predetermined receive beam forming a beam
pair with the predetermined transmit beam may be the receive beam
of best reception characteristics under conditions where the
predetermined transmit beam is applied. Alternatively, the
predetermined receive beam forming a beam pair with the
predetermined transmit beam may be one of the receive beams of best
reception characteristics under conditions where the predetermined
transmit beam is applied.
As illustrated in FIG. 7, it is desirable that a plurality of beam
pairs be configured in the terminal apparatus 1 and the base
station apparatus 3. For example, even in a case that beam pair #2
is unable to use as the terminal apparatus 1 moves, communication
can be performed using beam pair #1 and/or beam pair #3.
The plurality of beam pairs may constitute a group of beam pairs.
Unless otherwise noted, the beam pair may be a group of beam pairs.
The beam pair may include one or a plurality of transmit beams and
one or a plurality of receive beams.
The application of the predetermined beam to the physical signal
may also be referred to as a given beam corresponding to the
physical signal.
The correspondence relationship between the physical signal and the
receive beam will be described below.
The physical signal corresponding to the receive beam may be the
predetermined antenna port corresponding to the physical signal.
Here, the predetermined antenna port may correspond to a transmit
beam that forms a beam pair with the receive beam. That is, the
physical signal corresponding to the receive beam may be that the
antenna port corresponding to the predetermined transmit beam
corresponds to the physical signal. The receive beam corresponding
to the physical signal may be an antenna port to which the physical
signal corresponds. The antenna port may be an antenna port
corresponding to a transmit beam that forms a beam pair with the
receive beam.
Here, an antenna port is defined as one in which a channel conveyed
by a certain symbol of a certain antenna port can be estimated from
a channel conveyed by another symbol of the same antenna port. That
is, for example, in a case that a first physical channel and a
first reference signal are conveyed by symbols of the same antenna
port, channel compensation of the first physical channel can be
performed by the first reference signal. Here, the same antenna
port may be that antenna port numbers (numbers for identifying the
antenna ports) are the same. Here, the symbol may be, for example,
at least part of the OFDM symbol. Additionally, the symbol may be
the resource element.
The physical signal corresponding to the receive beam may be the
predetermined transmit beam corresponding to the physical signal.
That is, the receive beam corresponding to the physical signal may
indicate whether a predetermined transmit beam corresponds to the
physical signal. Here, the predetermined transmit beam may form a
beam pair with the receive beam.
The physical signal corresponding to the receive beam may be a
predetermined beam pair corresponding to the physical signal. The
predetermined beam pair may include the receive beam. That is, the
receive beam corresponding to the physical signal may be a beam
pair that includes the received beam.
The physical signal corresponding to the receive beam may be that
the first antenna port corresponding to the physical signal and the
second antenna port are Quasi Co-Location (QCL). Here, the first
antenna port and the second antenna port being QCL may be that at
least a portion of the nature of the channel on which a symbol of
the first antenna port carries can be estimated from the channel on
which other symbols of the second antenna port carry. The nature of
the channel may include at least some or all of a beam, reception
power (reception power value, reception power density, reception
strength, etc.), transmit power (transmit power value, transmit
power density, transmission strength, etc.), Timing advance (TA),
Angle of Arival (AoA), Doppler shift, delay spread (or maximum
delay time, etc.), and delay extension (delay expansion,
instantaneous delay extension, instantaneous delay expansion,
etc.). Here, the second antenna port may be an antenna port
corresponding to Channel State Information-Reference Signal
(CSI-RS) corresponding to the receive beam. The second antenna port
may also be an antenna port corresponding to a synchronization
signal corresponding to the receive beam. That is, the receive beam
corresponding to the physical signal may indicate whether the first
antenna port and the second antenna port configured to the physical
signal are QCL.
The physical signal corresponding to the receive beam may be that
the beam index associated with the physical signal corresponds to a
predetermined beam. Here, the predetermined beam may be included in
a predetermined beam pair.
The correspondence relationship between the control channel and the
receive beam will be described below.
FIG. 8 is a diagram illustrating an example of a correspondence
relationship between a physical signal included in a slot and a
receive beam according to the aspect of the present embodiment. In
FIG. 8, the physical signal included in slots indicated by blocks
without a pattern corresponds to receive beam #1. The physical
signal included in slots indicated by blocks of a hatched pattern
corresponds to receive beam #2. The physical signal included in
slots indicated by blocks of a grid pattern corresponds to receive
beam #3. That is, the receive beam corresponding to the physical
signal may be given in slot units. The receive beam corresponding
to the physical signal may vary from slot to slot.
Part (a) of FIG. 8 is an example in which a pattern of receive
beams corresponding to physical signals included in the slots is
periodic. Part (b) of FIG. 8 is an example in which a pattern of
receive beams corresponding to physical signals included in the
slots is aperiodic. In part (b) of FIG. 8, based on the control
channel included in slot #6, the receive beam corresponding to the
physical signal included in slot #7 switches from receive beam #1
to receive beam #2. Thus, the pattern of the receive beams
corresponding to the physical signals included in the slots may be
given periodically or aperiodically.
A first receive beam corresponding to a first physical signal
included in the predetermined period and a second receive beam
corresponding to a second physical signal included in the
predetermined period may be the same. The predetermined period may
be given by one or a plurality of slots. For example, the
predetermined period may be one slot, two slots, three slots, or 10
slots. The predetermined period may be given by one or a plurality
of OFDM symbols. For example, the predetermined period may be one
OFDM symbol, two OFDM symbols, three OFDM symbols, seven OFDM
symbols, or 14 OFDM symbols.
The predetermined period may indicate a range in which the control
resource set is mapped to the resource elements. The predetermined
period may indicate a range in which the CSS is mapped to the
resource elements. The predetermined period may indicate a range in
which the USS is mapped to the resource elements.
The receive beam corresponding to the physical signal generated at
the predetermined period may be given based at least on the type
(kind) of the physical signal. The first receive beam corresponding
to the first physical signal generated at the predetermined period
and the second receive beam corresponding to the first physical
signal may be different from each other or may be the same.
The receive beam corresponding to the physical signal generated at
the predetermined period may be given based on specifications and
the like. The receive beam corresponding to the physical signal
generated at the predetermined period may be given based at least
on the higher layer signaling (MIB, SIB, common RRC signaling,
dedicated RRC signaling, MAC layer signal, etc.). The higher layer
signaling may include some or all of MIB, SIB, common RRC
signaling, dedicated RRC signaling, and MAC layer signal. The
receive beam corresponding to the physical signal generated at the
predetermined period may be given based on at least the downlink
control information. That is, methods by which the first receive
beam corresponding to the first physical signal and the second
receive beam corresponding to the second physical signal generated
at the predetermined period are given may be different from each
other. For example, the first receive beam corresponding to the
control channel generated at the predetermined period may be given
based at least on the higher layer signaling, and the second
receive beam corresponding to the reference signal generated at the
predetermined period may be given based at least on the downlink
control information. Here, the MAC layer signal may be Midium
Access Control Control Element (MAC CE).
The receive beam corresponding to the physical signal generated at
the predetermined period may be a receive beam corresponding to a
channel of a physical layer including information indicating
transmission of the physical signal (information related to a
resource allocation of the physical signal, an index used for
coding, a grant, etc.). For example, the receive beam corresponding
to the broadcast channel generated at the predetermined period may
be a receive beam corresponding to a physical signal (e.g., PSS, or
SSS, etc.) that includes information indicating transmission of the
broadcast channel. The receive beam corresponding to the shared
channel generated at the predetermined period may be a receive beam
corresponding to a control channel including information (grant)
indicating transmission of the shared channel.
The second physical signal may correspond to the first receive beam
in a case that the first receive beam corresponds to the first
physical signal generated at a predetermined period (or the first
period) and the second physical signal is generated at the
predetermined period. The second physical signal may correspond to
the second receive beam in a case that the first receive beam
corresponds to the first physical signal generated at a
predetermined period (or the first period) and the second physical
signal is generated at the second period. Note that the first
physical signal generated at the second period may correspond to
the first receive beam. Here, the first period and the second
period may be individually defined periods. The first period and
the second period may be configured individually. That is, the
first period and the second period may be individual
parameters.
The first physical signal may include at least some or all of a
synchronization signal, a reference signal, or a channel of a
physical layer. The second physical signal may include at least one
of a synchronization signal, a reference signal, and a channel of a
physical layer. For example, the first physical signal may include
a control channel and the second physical signal may include a
CSI-RS. The first physical signal may include a control channel and
the second physical signal may include a shared channel. The first
physical signal may include a synchronization signal and the second
physical signal may include a control channel. The first physical
signal may include a synchronization signal and the second physical
signal may include a control channel. The first physical signal and
the second physical signal may be physical signals of the same
type. That is, even with the physical signals of the same type, a
priority order may be provided for the receive beam or beam pair.
Note that the combinations of the first physical signal and the
second physical signal are not limited to the above.
The first physical signal may correspond to the first receive beam
in a case that the transmission of the first physical signal
generated at the predetermined period is indicated by the first
PDCCH. The first physical signal may correspond to the second
receive beam in a case that the transmission of the first physical
signal generated at the predetermined period is indicated by the
second PDCCH. Here, the first PDCCH may be a PDCCH added with a
Cyclic Redandancy Check (CRC) sequence masked by the first Radio
Network Temporary Identifier (RNTI). The second PDCCH may be a
PDCCH added with a CRC sequence masked with the second RNTI. The
first PDCCH may also correspond to the first receive beam. The
second PDCCH may also correspond to the second receive beam. The
first PDCCH may or may not be detected at the predetermined period.
The second PDCCH may or may not be detected at the predetermined
period. Whether or not the first PDCCH corresponds to the first
receive beam may be given based on at least some or all of the
higher layer signaling and the downlink control information.
Whether or not the second PDCCH corresponds to the second receive
beam may be given based on at least some or all of the higher layer
signaling and the downlink control information. Whether or not the
PDCCH and the physical signal correspond to the same receive beam
may be given based on at least some or all of the higher layer
signaling and the downlink control information.
The first RNTI may be a Cell specific-RNTI (C-RNTI). The second
RNTI may be a Semi Persistent Scheduling C-RNTI (SPS C-RNTI).
The first RNTI may be a C-RNTI. The second RNTI may be a Ramdom
Access-RNTI (RA-RNTI). Here, in a case that the second RNTI is a
RA-RNTI, the second receive beam may correspond to the third PDCCH
(PDCCH order) that triggers transmission of PRACH associated with
the second PDCCH. Here, the PDCCH order may include a function of
triggering transmission of the random access channel. The PDCCH
order may include at least a field indicating an index of the
random access channel. The PDCCH order may include at least
information related to an index of the random access preamble
transmitted in the random access channel.
The first receive beam may be rephrased by the first antenna port.
The second receive beam may be rephrased by the second antenna
port. Here, the first antenna port may correspond to the first
receive beam. The second antenna port may correspond to the second
receive beam.
The first receive beam may be rephrased by the first transmit beam.
The second receive beam may be rephrased by the second transmit
beam. Here, the first receive beam and the first transmit beam may
form a first beam pair. The second physical signal may also
correspond to the second receive beam. The second receive beam and
the second transmit beam may also form a second beam pair.
The first receive beam may be rephrased by the first beam pair. The
second receive beam may be rephrased by the second beam pair. Here,
the first physical signal may correspond to the first receive beam.
The second physical signal may correspond to the second receive
beam. The first beam pair may include at least the first receive
beam. The second beam pair may include at least the second receive
beam.
The first receive beam corresponding to the first physical signal
may be that the first antenna port corresponding to the first
physical signal and the second antenna port are QCL. The second
receive beam corresponding to the second physical signal may be
that the third antenna port corresponding to the second physical
signal and the fourth antenna port are QCL. The first receive beam
corresponding to the second physical signal may be that the third
antenna port corresponding to the second physical signal and the
second antenna port are QCL.
The first receive beam may be rephrased by the first beam index.
The second receive beam may be rephrased by the second beam
index.
In a case that the first receive beam corresponds to the first
physical signal generated at a predetermined period (or the first
period) and the second physical signal is generated at the
predetermined period, whether the second physical signal
corresponds to the first receive beam or the second receive beam
may be given based at least on the functional information
transmitted from the terminal apparatus 1. Here, the functional
information is information indicating whether or not the terminal
apparatus 1 includes a predetermined function. The functional
information is transmitted from the terminal apparatus 1 to the
base station apparatus 3. The transmission of the functional
information may be performed based on RRC signaling. The functional
information may be information indicating whether or not the
function of switching the receive beam at a predetermined period is
provided.
The functional information may be information indicating whether
the second physical signal corresponds to the first receive beam or
the second receive beam, in a case that the first receive beam
corresponds to the first physical signal generated at a
predetermined period (or the first period) and the second physical
signal is generated at the predetermined period.
An apparatus configuration of the terminal apparatus 1 according to
the present embodiment will be described below.
FIG. 9 is a schematic block diagram illustrating a configuration
example of the terminal apparatus 1 according to the aspect of the
present embodiment. As illustrated in the diagram, the terminal
apparatus 1 is configured to include at least one of a higher layer
processing unit 101, a controller 103, a receiver 105, a
transmitter 107, and a transmit and/or receive antenna 109. The
higher layer processing unit 101 is configured to include at least
one of a radio resource control unit 1011 and a scheduling unit
1013. The receiver 105 is configured to include at least one of a
decoding unit 1051, a demodulation unit 1053, a demultiplexing unit
1055, a radio receiving unit 1057, and a channel measurement unit
1059. The transmitter 107 is configured to include at least one of
a coding unit 1071, a shared channel generation unit 1073, a
control channel generation unit 1075, a multiplexing unit 1077, a
radio transmitting unit 1079, and an uplink reference signal
generation unit 10711.
The higher layer processing unit 101 outputs uplink data generated
by a user operation or the like, to the transmitter 107. The higher
layer processing unit 101 performs processing of a Medium Access
Control (MAC) layer, a Packet Data Convergence Protocol (PDCP)
layer, a Radio Link Control (RLC) layer, and a Radio Resource
Control (RRC) layer. Furthermore, the higher layer processing unit
101 generates control information for control of the receiver 105
and the transmitter 107 based on the downlink control information
or the like received by the control channel, and outputs the
generated control information to the controller 103. Note that part
of the processing of the medium access control layer may be
performed in the controller 103.
The radio resource control unit 1011 included in the higher layer
processing unit 101 manages various pieces of configuration
information of the terminal apparatus 1 itself. Each of the
configuration information may include configuration related to
radio resource control, configuration related to RRM
measurement/report, CSI measurement/report, configuration related
to transmit power control, configuration related to physical
channel/physical signal, configuration related to cell or beam. The
configuration information may be information provided by the base
station apparatus 3 and configured. Furthermore, the radio resource
control unit 1011 generates information to be mapped to each uplink
channel, and outputs the generated information to the transmitter
107.
The scheduling unit 1013 stores the downlink control information
received through the receiver 105. The scheduling unit 1013
controls the transmitter 107 via the controller 103 so as to
transmit the shared channel in accordance with a received uplink
grant. The scheduling unit 1013 controls the receiver 105 via the
controller 103 so as to receive the shared channel, in the subframe
in which a downlink grant is received, in accordance with the
received downlink grant. Here, the grant may be information
indicating a resource allocated to the shared channel.
In accordance with the control information originating from the
higher layer processing unit 101, the controller 103 generates a
control signal for control of the receiver 105 and the transmitter
107. The controller 103 outputs the generated control signal to the
receiver 105 and the transmitter 107 to control the receiver 105
and the transmitter 107.
The controller 103 may include a function of performing part of the
processing of the medium access control layer (e.g., a
retransmission indication, or the like). The controller 103 may be
a function included in the higher layer processing unit 101.
In accordance with the control signal input from the controller
103, the receiver 105 demultiplexes, demodulates, and decodes a
reception signal received from the base station apparatus 3 through
the transmit and/or receive antenna 109, and outputs the resulting
information from the decoding to the higher layer processing unit
101.
The radio receiving unit 1057 demodulates a downlink signal
received through the transmit and/or receive antenna 109, and
converts the demodulated analog signal to a digital signal. For
example, the radio receiving unit 1057 may perform Fast Fourier
Transform (FFT) on the digital signal, and extract a signal in the
frequency domain. The radio receiving unit 1057 may apply a receive
beam that performs phase transformation processing to the signal
received via the transmit and/or receive antenna 109. The radio
receiving unit 1057 may apply the receive beam to the signal in a
case that a predetermined receive beam corresponding to the
physical signal included in the signal corresponds. A
correspondence relationship between the physical signal included in
the signal and the predetermined receive beam may be indicated by
the controller 103.
The demultiplexing unit 1055 demultiplexes the extracted signal
into the control channel (or the control resource set), the shared
channel, and the reference signal. The demultiplexing unit 1055
outputs the reference signal resulting from the demultiplexing, to
the channel measurement unit 1059 and/or the demultiplexing unit
1055.
The demultiplexing unit 1055 performs Channel Equalization of the
control channel and/or the shared channel. The control channel
and/or the shared channel after the channel equalization is output
to the demodulation unit 1053. The demultiplexing unit 1055 may
apply a receive beam to the control channel and/or the shared
channel. The demultiplexing unit 1055 may apply a predetermined
receive beam to the control channel and/or the shared channel in a
case that a predetermined receive beam corresponding to the control
channel and/or the shared channel corresponds. A correspondence
relationship between the control channel and/or the shared channel
and the predetermined receive beam may be indicated by the
controller 103.
The channel measurement unit 1059 performs channel measurement
based on a synchronization signal and/or a reference signal. The
channel measurement value given based on the channel measurement is
output to the demultiplexing unit 1055.
The demodulation unit 1053 demodulates the control channel and/or
the shared channel in accordance with a modulation scheme such as
BPSK, QPSK, 16 QAM, 64 QAM, and the like, and outputs the result of
the demodulation to the decoding unit 1051.
The decoding unit 1051 decodes the downlink data, and outputs, to
the higher layer processing unit 101, the downlink data resulting
from the decoding.
The transmitter 107 generates an uplink reference signal in
accordance with the control signal input from the controller 103,
codes and modulates the uplink data and uplink control information
input from the higher layer processing unit 101, multiplexes the
shared channel, the control channel, and the reference signal, and
transmits a result of the multiplexing to the base station
apparatus 3 through the transmit and/or receive antenna 109.
The coding unit 1071 codes the control information and the uplink
data input from the higher layer processing unit 101 to generate
coded bits, and outputs the coded bits to the shared channel
generation unit 1073 and/or the control channel generation unit
1075.
The shared channel generation unit 1073 may modulate the coded bits
input from the coding unit 1071 to generate a modulation symbol,
generate the shared channel by performing at least DFT on the
modulation symbol, and output the generated channel to the
multiplexing unit 1077. The shared channel generation unit 1073 may
modulate the coded bits input from the coding unit 1071 to generate
the shared channel, and output the generated channel to the
multiplexing unit 1077.
The control channel generation unit 1075 generates the control
channel based on the coded bits input from the coding unit 1071
and/or the scheduling request, and outputs the generated channel to
the multiplexing unit 1077.
The uplink reference signal generation unit 10711 generates the
uplink reference signal, and outputs the generated uplink reference
signal to the multiplexing unit 1077.
The multiplexing unit 1077 multiplexes the signal input from the
shared channel generation unit 1073 and/or the signal input from
the control channel generation unit 1075 and/or the uplink
reference signal input from the uplink reference signal generation
unit 10711, in accordance with the control signal input from the
controller 103, on the uplink resource for each transmit antenna
port. The multiplexing unit 1077 outputs the multiplexed signal to
the radio transmitting unit 1079.
The radio transmitting unit 1079 performs Inverse Fast Fourier
Transform (IFFT) on the signal resulting from the multiplexing,
generates a baseband digital signal, converts the baseband digital
signal into an analog signal, generates an in-phase component and
an orthogonal component of an intermediate frequency from the
analog signal, removes frequency components unnecessary for the
intermediate frequency band, converts (up-converts) the signal of
the intermediate frequency into a signal of a high frequency,
removes unnecessary frequency components, performs power
amplification, and outputs a final result to the transmit and/or
receive antenna 109 for transmission.
An apparatus configuration of the base station apparatus 3
according to the present embodiment will be described below.
FIG. 10 is a schematic block diagram illustrating a configuration
example of the base station apparatus 3 according to the aspect of
the present embodiment. As is illustrated, the base station
apparatus 3 is configured to include at least one of a higher layer
processing unit 301, a controller 303, a receiver 305, a
transmitter 307, and a transmit and/or receive antenna 309.
Additionally, the higher layer processing unit 301 is configured to
include at least one of a radio resource control unit 3011 and a
scheduling unit 3013. Additionally, the receiver 305 is configured
to include at least one of a data demodulation/decoding unit 3051,
a control information demodulation/decoding unit 3053, a
demultiplexing unit 3055, a radio receiving unit 3057, and a
channel measurement unit 3059. Additionally, the transmitter 307 is
configured to include at least one of a coding unit 3071, a
modulating unit 3073, a multiplexing unit 3075, a radio
transmitting unit 3077, and a downlink reference signal generation
unit 3079.
The higher layer processing unit 301 performs processing of the
Medium Access Control (MAC) layer, the Packet Data Convergence
Protocol (PDCP) layer, the Radio Link Control (RLC) layer, and the
Radio Resource Control (RRC) layer. Furthermore, the higher layer
processing unit 301 generates control information for control of
the receiver 305 and the transmitter 307, and outputs the generated
control information to the controller 303. Note that part of the
processing of the medium access control layer may be performed in
the controller 303.
The radio resource control unit 3011 included in the higher layer
processing unit 301 can generate, or acquire from a higher node,
the downlink data mapped to the downlink shared channel, the RRC
signaling, and an MAC Control Element (MAC CE), and output the
result of the generation or the acquirement to the scheduling unit
3013 or the controller 303. Furthermore, the radio resource control
unit 3011 manages various configuration information for each of the
terminal apparatuses 1.
The scheduling unit 3013 included in the higher layer processing
unit 301 manages radio resources of the shared channel and the
control channel allocated to the terminal apparatus 1. In a case
that the radio resource of the shared channel is allocated to the
terminal apparatus 1, the scheduling unit 3013 generates the uplink
grant indicating the allocation of the radio resource of the shared
channel, and outputs the generated uplink grant to the transmitter
307.
Based on the control information originating from the higher layer
processing unit 301, the controller 303 generates a control signal
for controlling the receiver 305 and the transmitter 307. The
controller 303 outputs the generated control signal to the receiver
305 and the transmitter 307 to control the receiver 305 and the
transmitter 307.
The controller 303 may include a function of performing part of the
processing of the medium access control layer (e.g., a
retransmission indication, or the like).
In accordance with the control signal input from the controller
303, the receiver 305 demultiplexes, demodulates, and decodes the
reception signal received from the terminal apparatus 1 through the
transmit and/or receive antenna 309, and outputs information
resulting from the decoding to the higher layer processing unit
301.
The radio receiving unit 3057 performs orthogonal demodulation on
the uplink signal received through the transmit and/or receive
antenna 309, and converts the orthogonally-demodulated analog
signal to a digital signal. The radio receiving unit 3057 performs
Fast Fourier Transform (FFT) on the digital signal, extracts a
signal in the frequency domain, and outputs the resulting signal to
the demultiplexing unit 3055.
The demultiplexing unit 3055 demultiplexes the signal input from
the radio receiving unit 3057 into the control channel, the shared
channel, and the signal such as the reference signal. The
demultiplexing may be performed based on radio resource allocation
information that is determined in advance by the base station
apparatus 3 using the radio resource control unit 3011 and that is
included in the uplink grant each of which is notified to the
terminal apparatuses 1. The demultiplexing unit 3055 makes a
compensation of channels including the control channel and the
shared channel from a channel estimate input from the channel
measurement unit 3059. Furthermore, the demultiplexing unit 3055
outputs the reference signal resulting from the demultiplexing, to
the channel measurement unit 3059.
The demultiplexing unit 3055 acquires a modulation symbol including
the uplink data and a modulation symbol including the uplink
control information from the demultiplexed control channel and
shared channel. The demultiplexing unit 3055 outputs the modulation
symbol including the uplink data acquired from the signal of the
shared channel to the data demodulation/decoding unit 3051. The
demultiplexing unit 3055 outputs the modulation symbol including
the uplink control information acquired from the control channel or
the shared channel to the control information demodulation/decoding
unit 3053.
The channel measurement unit 3059 measures the channel estimate,
the channel quality, and the like, based on the uplink reference
signal input from the demultiplexing unit 3055, and outputs a
result of the measurement to the demultiplexing unit 3055 and the
higher layer processing unit 301.
The data demodulation/decoding unit 3051 decodes the uplink data
from the modulation symbol of the uplink data input from the
demultiplexing unit 3055. The data demodulation/decoding unit 3051
outputs the decoded uplink data to the higher layer processing unit
301.
The control information demodulation/decoding unit 3053 decodes
HARQ-ACK from the modulation symbol including the uplink control
information input from the demultiplexing unit 3055. The control
information demodulation/decoding unit 3053 can output the decoded
uplink control information to the higher layer processing unit 301
or the controller 303.
The transmitter 307 generates the downlink reference signal in
accordance with the control signal input from the controller 303,
codes and modulates the downlink control information and the
downlink data input from the higher layer processing unit 301,
includes some or all of the control channel, the control resource
set, the shared channel, and the reference signal, and transmits
the signal to the terminal apparatus 1 through the transmit and/or
receive antenna 309. The transmitter 307 may apply a transmit beam
to some or all of the control channel, the control resource set,
the shared channel, and the reference signal.
The coding unit 3071 performs coding on the downlink control
information and the downlink data input from the higher layer
processing unit 301. The modulating unit 3073 modulates the coded
bits input from the coding unit 3071, in compliance with the
modulation scheme such as BPSK, QPSK, 16 QAM, or 64 QAM. The
modulating unit 3073 may apply transmission precoding to the
modulation symbol. The transmission precoding may include
transmission pre-code. Note that the transmission precoding may be
multiplication (application) of the transmission precoder. The
transmission precoder may be the DFT (or may be the DFT
diffusion).
The downlink reference signal generation unit 3079 generates the
downlink reference signal. The multiplexing unit 3075 multiplexes
the modulation symbol of each channel and the downlink reference
signal to generate the transmission symbol.
The multiplexing unit 3075 may apply a precoder to the transmission
symbol. The precoder applied to the transmission symbol by the
multiplexing unit 3075 may be applied to the downlink reference
signal and/or the modulation symbol. Additionally, the precoder
applied to the downlink reference signal and the precoder applied
to the modulation symbol may be the same or different.
The precoder is one method of forming a beam. The precoder is an
operator (vector) that provides, for each transmit antenna, a phase
rotation applied to the transmission symbol transmitted from one or
a plurality of transmit antennas. In a Spatial Division Multiplex
(SDM) in which a plurality of transmission symbols is multiplexed
at the same time/frequency, since at least one vector is given for
the plurality of transmission symbols, the precoder may be
expressed by a matrix.
The radio transmitting unit 3077 generates a time symbol by
performing Inverse Fast Fourier Transform (IFFT) on the multiplexed
transmission symbol and the like. The radio transmitting unit 3077
performs the modulation in compliance with an OFDM scheme on the
time symbol, generates a digital signal in a baseband, converts the
digital signal in the baseband into an analog signal, generates an
in-phase component and an orthogonal component of an intermediate
frequency from the analog signal, removes frequency components
unnecessary for the intermediate frequency band, converts
(up-converts) the signal of the intermediate frequency into a
signal of a high frequency, removes unnecessary frequency
components, and generates a Carrier signal (Carrier, RF signal, or
the like). The radio transmitting unit 3077 performs power
amplification on the carrier signal, and outputs the final result
to the transmit and/or receive antenna 309 for transmission. The
radio transmitting unit 3077 may apply a transmit beam to the
carrier signal.
Aspects of various apparatuses according to the aspect of the
present embodiment will be described below.
(1) To accomplish the object described above, aspects of the
present invention are contrived to provide the following measures.
Specifically, a first aspect of the present invention is a terminal
apparatus including: a receiver configured to receive at least a
first physical signal and/or a second physical signal, wherein the
first physical signal is generated during a first period, the first
physical signal corresponds to a first beam during the first
period, the second physical signal corresponds to the first beam in
a case that the second physical signal is generated during the
first period, and the second physical signal corresponds to a
second beam in a case that the second physical signal is generated
during a second period.
(2) In the first aspect of the present invention, the first period
is a unit (slot) by which a transport block is mapped.
(3) A second aspect of the present invention is a terminal
apparatus including: a decoding unit configured to decode a PDCCH;
and a receiver configured to receive a PDSCH at least based on the
PDCCH, wherein the PDSCH is generated in a first slot, and in a
case that the PDCCH is a first PDCCH to which the CRC sequence to
be masked based on a first RNTI is added, the PDSCH corresponds to
a first beam, and in a case that the PDCCH is a second PDCCH to
which a CRC sequence to be masked based on a second RNTI is added,
the PDSCH corresponds to a second beam.
(4) In the second aspect of the present invention, the first beam
corresponds to the first PDCCH or is indicated by the first
PDCCH.
(5) A third aspect of the present invention is a base station
apparatus including: a transmitter configured to transmit at least
a first physical signal and/or a second physical signal, wherein
the first physical signal is transmitted during a first period, the
first physical signal corresponds to a first beam during the first
period, the second physical signal corresponds to the first beam in
a case that the second physical signal is transmitted during the
first period, and the second physical signal corresponds to a
second beam in a case that the second physical signal is
transmitted during a second period.
(6) In the third aspect of the present invention, the first period
is a unit (slot) by which a transport block is mapped.
(7) A fourth aspect of the present invention is a base station
apparatus including: a coding unit configured to code a PDCCH and a
PDSCH; and a transmitter configured to transmit the PDCCH and the
PDSCH, wherein the PDCCH includes allocation information of the
PDSCH, the PDSCH is transmitted in a first slot, and in a case that
the PDCCH is a first PDCCH to which the CRC sequence to be masked
based on a first RNTI is added, the PDSCH corresponds to a first
beam corresponding to the first slot, and in a case that the PDCCH
is a second PDCCH to which a CRC sequence to be masked based on a
second RNTI is added, the PDSCH corresponds to a second beam.
(8) In the fourth aspect of the present invention, the first beam
corresponds to the first PDCCH or is indicated by the first
PDCCH.
Each of programs running on a base station apparatus 3 and a
terminal apparatus 1 according to the aspect of the present
invention may be a program that controls a Central Processing Unit
(CPU) and the like, such that the program causes a computer to
operate in such a manner as to realize the functions of the
above-described embodiment according to the aspect of the present
invention. The information handled in these devices is temporarily
stored in a Random Access Memory (RAM) while being processed.
Thereafter, the information is stored in various types of Read Only
Memory (ROM) such as a Flash ROM and a Hard Disk Drive (HDD), and
when necessary, is read by the CPU to be modified or rewritten.
Note that the terminal apparatus 1 and the base station apparatus 3
according to the above-described embodiment may be partially
achieved by a computer. In that case, this configuration may be
realized by recording a program for realizing such control
functions on a computer-readable recording medium and causing a
computer system to read the program recorded on the recording
medium for execution.
Note that it is assumed that the "computer system" mentioned here
refers to a computer system built into the terminal apparatus 1 or
the base station apparatus 3, and the computer system includes an
OS and hardware components such as a peripheral apparatus.
Furthermore, the "computer-readable recording medium" refers to a
portable medium such as a flexible disk, a magneto-optical disk, a
ROM, a CD-ROM, and the like, and a storage apparatus such as a hard
disk built into the computer system.
Moreover, the "computer-readable recording medium" may include a
medium that dynamically retains a program for a short period of
time, such as a communication line that is used to transmit the
program over a network such as the Internet or over a communication
line such as a telephone line, and may also include a medium that
retains a program for a fixed period of time, such as a volatile
memory within the computer system for functioning as a server or a
client in such a case. Furthermore, the program may be configured
to realize some of the functions described above, and also may be
configured to be capable of realizing the functions described above
in combination with a program already recorded in the computer
system.
Furthermore, the base station apparatus 3 according to the
above-described embodiment may be achieved as an aggregation (an
apparatus group) including multiple apparatuses. Each of the
apparatuses constituting such an apparatus group may include a
portion or all of each function or each functional block of the
base station apparatus 3 according to the above-described
embodiment. The apparatus group may include each general function
or each functional block of the base station apparatus 3.
Furthermore, the terminal apparatus 1 according to the
above-described embodiment can also communicate with the base
station apparatus as the aggregation.
Furthermore, the base station apparatus 3 according to the
above-described embodiment may serve as an Evolved Universal
Terrestrial Radio Access Network (EUTRAN). Furthermore, the base
station apparatus 3 according to the above-described embodiment may
have some or all portions of the functions of a node higher than an
eNodeB.
Furthermore, some or all portions of each of the terminal apparatus
1 and the base station apparatus 3 according to the above-described
embodiment may be typically achieved as an LSI which is an
integrated circuit or may be achieved as a chip set. The functional
blocks of each of the terminal apparatus 1 and the base station
apparatus 3 may be individually achieved as a chip, or some or all
of the functional blocks may be integrated into a chip.
Furthermore, a circuit integration technique is not limited to the
LSI, and may be realized with a dedicated circuit or a
general-purpose processor. Furthermore, in a case where with
advances in semiconductor technology, a circuit integration
technology with which an LSI is replaced appears, it is also
possible to use an integrated circuit based on the technology.
Furthermore, according to the above-described embodiment, the
terminal apparatus has been described as an example of a
communication apparatus, but the present invention is not limited
to such a terminal apparatus, and is applicable to a terminal
apparatus or a communication apparatus of a fixed-type or a
stationary-type electronic apparatus installed indoors or outdoors,
for example, such as an Audio-Video (AV) apparatus, a kitchen
apparatus, a cleaning or washing machine, an air-conditioning
apparatus, office equipment, a vending machine, and other household
apparatuses.
The embodiments of the present invention have been described in
detail above referring to the drawings, but the specific
configuration is not limited to the embodiments and includes, for
example, an amendment to a design that falls within the scope that
does not depart from the gist of the present invention.
Furthermore, various modifications can be made to the aspect of the
present invention within the scope of the present invention defined
by claims, and embodiments that are made by suitably combining
technical means disclosed according to the different embodiments
are also included in the technical scope of the present invention.
Furthermore, a configuration in which constituent elements,
described in the respective embodiments and having mutually the
same effects, are substituted for one another is also included in
the technical scope of the present invention.
INDUSTRIAL APPLICABILITY
An aspect of the present invention can be utilized, for example, in
a communication system, communication equipment (for example, a
cellular phone apparatus, a base station apparatus, a radio LAN
apparatus, or a sensor device), an integrated circuit (for example,
a communication chip), or a program.
REFERENCE SIGNS LIST
1 (1A, 1B, 1C) Terminal apparatus 3 Base station apparatus 101, 301
Higher layer processing unit 103, 303 Controller 105, 305 Receiver
107, 307 Transmitter 109, 309 Transmit and/or receive antenna 1011,
3011 Radio resource control unit 1013, 3013 Scheduling unit 1051
Decoding unit 1053 Demodulation unit 1055, 3055 Demultiplexing unit
1057, 3057 Radio receiving unit 1059, 3059 Channel measurement unit
1071, 3071 Coding unit 1073 Shared channel generation unit 1075
Control channel generation unit 1077, 3075 Multiplexing unit 1079,
3077 Radio transmitting unit 10711 Uplink reference signal
generation unit 3051 Data demodulation/decoding unit 3053 Control
information demodulation/decoding unit 3073 Modulating unit 3079
Downlink reference signal generation unit
* * * * *